125305503 has 16 divisors (see below), whose sum is σ = 174412800. Its totient is φ = 79928640.

The previous prime is 125305493. The next prime is 125305519. The reversal of 125305503 is 305503521.

It is not a de Polignac number, because 125305503 - 2¹⁰ = 125304479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125305003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 708 + ... + 15846.

It is an arithmetic number, because the mean of its divisors is an integer number (10900800).

Almost surely, 2^125305503 is an apocalyptic number.

125305503 is a deficient number, since it is larger than the sum of its proper divisors (49107297).

125305503 is a wasteful number, since it uses less digits than its factorization.

125305503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15262.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 125305503 is about 11193.9940593159. The cubic root of 125305503 is about 500.4070059358.

The spelling of 125305503 in words is "one hundred twenty-five million, three hundred five thousand, five hundred three".